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anonymous

  • 5 years ago

Solve each system using substitution. y= 3x +11 y= -2x +1

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  1. anonymous
    • 5 years ago
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    This means the same thing as y = 3x + 11 AND y = -2x + 1

  2. myininaya
    • 5 years ago
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    hey! :) 3x+11=-2x+1 can you solve this?

  3. anonymous
    • 5 years ago
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    So you can set them equal, as myininaya has done.

  4. anonymous
    • 5 years ago
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    yea

  5. myininaya
    • 5 years ago
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    :)

  6. anonymous
    • 5 years ago
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    so all i havta to is solve that euation?

  7. myininaya
    • 5 years ago
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    basically

  8. myininaya
    • 5 years ago
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    solving that equation will give us x

  9. myininaya
    • 5 years ago
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    and then when we get x we plug it into one of the equations given to find y

  10. myininaya
    • 5 years ago
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    therefore finding the point of intersection (x,y)

  11. myininaya
    • 5 years ago
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    so if you want to try to solve for x i will do the same and i can tell you if you are right but if you run into trouble we can solve together okay?

  12. anonymous
    • 5 years ago
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    Ok :)

  13. anonymous
    • 5 years ago
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    3x+11=-2x+1 +2x +2x 5x+11=1 -11 -11 5x= 12 ___ ____ 5 5

  14. myininaya
    • 5 years ago
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    so 1-11 is 12 ?

  15. myininaya
    • 5 years ago
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    what is 11-1?

  16. anonymous
    • 5 years ago
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    oh sryy

  17. anonymous
    • 5 years ago
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    -10

  18. myininaya
    • 5 years ago
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    perfect! :)

  19. myininaya
    • 5 years ago
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    so we have 5x=-10

  20. anonymous
    • 5 years ago
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    x= -2

  21. myininaya
    • 5 years ago
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    brilliant! :) now plug this into one of the equations given to find y like this y=3(-2)+11

  22. myininaya
    • 5 years ago
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    i just replaced x with -2 since x=-2

  23. myininaya
    • 5 years ago
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    now you are to simplify 3(-2)+11 to find y

  24. anonymous
    • 5 years ago
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    y=6 ?

  25. myininaya
    • 5 years ago
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    well 3(-2)+11 is y i just mean simplify lol

  26. myininaya
    • 5 years ago
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    -6+11=11-6=5 right?

  27. anonymous
    • 5 years ago
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    right,

  28. anonymous
    • 5 years ago
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    so y=5

  29. anonymous
    • 5 years ago
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    (-2,5) correct?

  30. myininaya
    • 5 years ago
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    that is totally correct

  31. anonymous
    • 5 years ago
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    Thank you!! XD

  32. myininaya
    • 5 years ago
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    if you had used the other equation you still would have got same thing by the way

  33. myininaya
    • 5 years ago
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    great job! you get a medal!

  34. anonymous
    • 5 years ago
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    Your the best!, thanks :D

  35. myininaya
    • 5 years ago
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    I know.

  36. myininaya
    • 5 years ago
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    Thanks. lol

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